Credit: RadTech
Only just seen this, so haven’t had a chance to try it out, but it looks like a small rubber band could be adapted to the same purpose.
http://the-gadgeteer.com/2014/12/11/stop-wasting-time-untangling-your-earbuds-with-the-stopknot/ / earphone ear bud earbud ear phone cable cord controller tangle knot coiling into a knotted mess pocket bag wind StopKnot RadTech slide earbud cable once control knotting quick step install StopKnot grips both earbuds 3.5mm audio plug StopKnot stops knotting use earbuds slide length adjuster flop around exercising working iPhone Samsung Bose Skull Candy Android smartphone mp3 player /
